JP4201446B2 - Lamp body for vehicle lamp, vehicle lamp using the same, and manufacturing method thereof - Google Patents

Description

【００２４】
（ロ）ビニル系共重合体（Ｂ）の製造
撹拌機、還流冷却器、窒素導入口、モノマー導入口、温度計の設置された反応器に下記の物質を仕込んだ。
純水 ２５０部
ラウリン酸ソーダ ３部
ナトリウムホルムアルデヒドスルホキシレート ０．４部
硫酸第一鉄 ０．００２５部
エチレンジアミン四酢酸二ナトリウム ０．０１部
反応器を撹拌しながら窒素気流下に６０℃まで昇温させた。６０℃に到達した後、表２に示すモノマー（Ｉ）を仕込んだ。十分乳化させた後、表２に示すモノマー（II）を連続的に６時間で滴下し、添加終了後、６０℃で１時間撹拌を続けて重合を終了した。
【００２５】
【表２】

【００２６】
（ハ）車両灯具用ランプボディ樹脂組成物（Ｃ）の製造及び糸引き性評価
前記（イ）、（ロ）で製造したグラフト共重合体（Ａ）とビニル系共重合体（Ｂ）をそれぞれラテックス状態で表３に記載した比率（固形分）で混合し、この混合ラテックスに酸化防止剤を添加し、塩化カルシウムで凝固させた後、加熱、脱水、水洗、乾燥後、得られたパウダーにフェノール系の抗酸化剤（ＡＯ−２０：旭電化工業株式会社製、０．３部）、リン系の安定剤（ＰＥＰ−２４Ｇ：旭電化工業株式会社製、０．３部）、滑剤ＥＢＳ（エチレンビスステアリン酸アマイド１．０部）を共通の添加剤として、また、帯電防止剤（テトラデカンスルホン酸ナトリウム又はドデシルベンゼンスルホン酸ナトリウム）を表３に示すようにブレンドして、２５０℃の温度で押出機（大阪精機（株）製、４０ｍｍφ単軸押出機）にてペレットを得た。得られたペレットを１５０ｔｏｎ射出成形機（ＦＡＮＵＣ製）を使用し、２５０℃の温度でＡＳＴＭの１号ダンベルと図１に示すランプボディ製品を成形し、それを用いて下記の糸引き性の評価を実施し、結果を表３に示した。
【００２７】
（ニ）ダンベル試験片を用いての糸引き性評価
射出成形にて得られたＡＳＴＭ１号ダンベルを成形直後すぐ下記▲１▼、▲２▼の条件の環境下に放置した。
条件▲１▼：２３℃、相対湿度５０％の恒温室に１週間放置。
条件▲２▼：冬場の低湿度を想定して、５℃、１５％ＲＨの恒温室に１週間放置。
この試験片を用いて、３２０℃に加熱したアルミニウム製の平板に、１０ｋｇｆ／ｃｍ²の圧力で１０秒間押しつけた後、このダンベルを５００ｍｍ／ｍｉｎの速度で引き上げた時に溶融面に発生した糸の長さ［ｃｍ］を測定した。
【００２８】
（ホ）ランプボディ製品を用いての糸引き性評価
射出成形にて得られた図１に示すランプボディ製品を成形直後すぐ下記▲１▼、▲２▼の条件の環境下に放置した。
条件▲１▼：２３℃、相対湿度５０％の恒温室に１週間放置。
条件▲２▼：冬場の低湿度を想定して、５℃、１５％ＲＨの恒温室に１週間放置。
この製品を熱板融着機を用いて、融着温度３２０℃、１０ｋｇｆ／ｃｍ²の圧力でアルミニウム製の熱板に１０秒間押しつけた後、５０ｍｍ／ｍｉｎの速度で引き上げた時に融着面に糸引きが発生するかどうかを判定した。
【００２９】
【表３】

【００３０】
表３の結果から明らかなように、低湿度下にてコンディショニングさせたものでも本発明によれば、従来から使用されている比較例のＡＢＳ樹脂組成物からなるランプボディを用いた場合に比べて、熱板融着法における糸引き性が大幅に改善されている。
【００３１】
【発明の効果】
本発明によれば、帯電防止剤を配合してなるゴム強化スチレン系樹脂を用いることで、従来からランプボディの材料として使用されている一般的なゴム強化スチレン系樹脂を用いる場合に比べて、例えば冬期のような低湿度環境下において、ランプボディに加熱した熱板を押し当てて溶融した後、溶融部分をランプレンズに圧着してランプボディとランプレンズとを接合して車両用灯具を製造する際の、ランプボディを構成する樹脂の糸引きを大幅に改善しうるものであり、特にヘッドランプ、ウィンカー、ストップランプ等の車両用灯具の製造に有用である。
【図面の簡単な説明】
【図１】 糸引き性評価に用いたランプボディ製品の断面図を示す。
【符号の説明】
１：ランプボディ、２：ランプ、３：融着面、４：ランプレンズ[0001]
BACKGROUND OF THE INVENTION
The present invention is a vehicle lamp such as a headlamp, blinker, stop lamp, etc., which is formed by joining a lamp body made of rubber-reinforced styrene resin and a lamp lens made of methyl methacrylate resin by a hot plate fusion method. The present invention also relates to a lamp body used therefor and a method for manufacturing the vehicle lamp.
[0002]
[Prior art]
As a method of joining the lamp body made of synthetic resin and the lamp lens, there is a method in which both are fixed with an adhesive. However, a hot plate is pressed against a lamp body made of a thermoplastic resin such as a general ABS resin and melted. After that, the so-called hot plate fusion method, in which the melted part is pressure-bonded to a lamp lens made of methyl methacrylate resin, etc., is adopted from the viewpoint of environmental problems because it uses no solvent at all, unlike the case of fixing with an adhesive. It has increased. However, in such a hot plate fusion method, after the thermoplastic resin constituting the lamp body such as the ABS resin is melted by the hot plate, the molten resin is stretched into a thread shape when the hot plate is pulled apart (hereinafter referred to as the “hot plate”). , Which is referred to as “thread drawing”), and this may adhere to the surface of the molded product of the lamp lens or the lamp body, resulting in a defect that causes an appearance defect. As a method for improving the stringing in the hot plate fusion method, for example, Japanese Patent Application Laid-Open No. 9-12902 discloses a thermoplastic resin such as a polycarbonate or an ABS resin made of a fluororesin such as polytetrafluoroethylene or the like. A method of adding to is proposed. However, in this method, when the hot plate fusion method is performed in a low humidity environment such as in winter, the stringing may not be completely eliminated.
[0003]
[Problems to be solved by the invention]
In view of the above-mentioned problems, the inventors of the present invention have used stringing of the resin constituting the lamp body when the lamp body is manufactured by joining the lamp body to the lamp lens by a hot plate fusion method. It aims to improve regardless of changes in
[0004]
[Means for Solving the Problems]
As a result of intensive studies to achieve the above problems, the inventors of the present invention formed a lamp body from a resin composition obtained by adding an antistatic agent to a rubber-reinforced styrene resin, and further, the rubber-reinforced styrene system. By using a resin composition obtained by blending a graft copolymer containing a specific component and a vinyl copolymer as a resin, it can be used in a hot plate fusion method even in a low humidity environment such as in winter. Thus, the present inventors have found that stringing can be significantly improved when a lamp body for a vehicle is manufactured by joining a lamp body and a lamp lens.
[0005]
That is, in the present invention, after a heated hot plate is pressed against a lamp body made of rubber-reinforced styrene resin and melted, the melted portion is pressure-bonded to the lamp lens to join the lamp body and the lamp lens to obtain a vehicle lamp. In manufacturing, the lamp body is formed by using a resin composition in which an antistatic agent is blended in an amount of 0.1 to 5 parts by weight with respect to a rubber-reinforced styrene-based resin. Resin composition (C) comprising as a main component 100 parts by weight of the following graft copolymer (A) 100 to 10 parts by weight and the following vinyl copolymer (B) 0 to 90 parts by weight as a styrene resin. Is to use.
(A) 80 to 5 parts by weight of a monomer mixture is graft-polymerized to 20 to 95 parts by weight of a rubber-like polymer, and the monomer mixture contains a vinyl cyanide compound, an aromatic vinyl compound, and an alkyl (meta ) 99.9-60% by weight of at least one vinyl compound selected from the group consisting of acrylate compounds, 0-30% by weight of other copolymerizable vinyl compounds, and glycidyl esters of α, β-unsaturated acids A graft copolymer comprising 0.1 to 40% by weight of a compound.
(B) A vinyl copolymer obtained by reacting 10 to 40% by weight of a vinyl cyanide compound, 60 to 90% by weight of an aromatic vinyl compound, and 0 to 30% by weight of another copolymerizable vinyl compound.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
In the present invention, it is particularly important that an antistatic agent is blended in the resin composition used for molding the lamp body. The antistatic agent is not particularly limited as long as it is usually used for ABS resin. For example, cationic surfactants such as alkyl amine salts, sulfates of higher alcohols, sulfates of ethylene oxide adducts of higher alcohols, sulfates of ethylene oxide adducts of alkylphenols, alkane sulfonates, alkylbenzene sulfonic acids Anionic surfactants such as salts, alkylsulfosuccinic acid ester salts, naphthalene sulfonic acid formalin condensate salts, higher alcohol ethylene oxide adduct phosphate salts, alkylphenol ethylene oxide adduct phosphate salts, higher fatty acid sorbitans Esters, higher fatty acid monoglycerin esters, higher fatty acid monoglycerin ester ethylene oxide adducts, higher alcohol ethylene oxide adducts, higher fatty acid ethylene oxide adducts, alkylphenol ethylene oxide Nonionic surfactants such as adducts, amide ethylene oxide adducts, ethylene oxide adducts of alkylamines, polyalkylene glycols, polyalkylene glycol copolymers, polyether ester amides, and the like. The above can be used. Among these, alkane sulfonates, alkylbenzene sulfonates, polyalkylene glycols and polyalkylene glycol copolymers, and polyether ester amides are preferred, particularly selected from the group consisting of alkane sulfonates and alkyl benzene sulfonates. Particularly preferred are at least one antistatic agent.
[0007]
Although there is no restriction | limiting in particular in carbon number of alkane or alkyl of the said alkane sulfonate, alkylbenzene sulfonate, C6-C29 is preferable, More preferably, it is 8-18. The number of sulfonic acid groups per molecule is not particularly limited, but the number of sulfonic acid groups is preferably 1 to 3. When the number of carbon atoms and the number of sulfonic acid groups are out of the above ranges, impact strength tends to decrease. Examples of the salt include sodium salt, potassium salt, lithium salt, calcium salt, magnesium salt and the like, and sodium salt and potassium salt are particularly preferable. These may be used alone or in combination of two or more.
[0008]
The amount of the antistatic agent used is 0.1 to 5 parts by weight, preferably 0.5 to 4 parts by weight, based on 100 parts by weight of the rubber-reinforced styrene resin. If it is less than 0.1 part by weight, the effect of improving the stringiness especially under low humidity is not sufficient.
[0009]
Examples of the rubber-reinforced styrene resin used in the present invention include ABS resin, AAS resin, AES resin and the like, and in particular, graft copolymer (A) 100 to 10 parts by weight and vinyl copolymer (B) 0. The resin composition (C) having 100 parts by weight as a main component of ˜90 parts by weight is preferable, and the composition shown below is preferable as the graft copolymer (A). That is, when the graft copolymer (A) graft-polymerizes 80 to 5 parts by weight of the monomer mixture to 20 to 95 parts by weight of the rubber-like polymer, the glycidyl ester compound 0. 1 to 40% by weight, more preferably 0.5 to 30% by weight, particularly preferably 5 to 20% by weight, and a group consisting of a vinyl cyanide compound, an aromatic vinyl compound, and an alkyl (meth) acrylate compound At least one vinyl compound selected from 99.9 to 60% by weight, more preferably, 0 to 40% by weight of a vinyl cyanide compound, 60 to 90% by weight of an aromatic vinyl compound, and an alkyl (meth) acrylate compound Graft copolymer obtained by reacting 99.9 to 60% by weight of a vinyl compound consisting of 0 to 30% by weight and 0 to 30% by weight of another copolymerizable vinyl compound It is a coalescence.
The vinyl copolymer (B) is prepared by reacting 10 to 40% by weight of a vinyl cyanide compound, 60 to 90% by weight of an aromatic vinyl compound, and 0 to 30% by weight of another copolymerizable vinyl compound. The vinyl-based copolymer is preferable.
In the graft copolymer (A), if the rubber-like polymer is less than 20 parts by weight, the impact strength of the lamp body is lowered, and if it exceeds 95 parts by weight, the fluidity of the resin is extremely inferior. Furthermore, if the glycidyl ester compound of α, β-unsaturated acid in the monomer mixture to be graft-polymerized to the rubber-like polymer is less than 0.1% by weight, it is sufficient for bonding with a lamp lens by hot plate fusion. If the amount exceeds 40% by weight, the resin fluidity at the time of molding the lamp body and the impact resistance of the molded lamp body are unfavorable.
[0010]
The rubbery polymer used in the graft copolymer (A) is not particularly limited, but diene such as polybutadiene rubber, styrene-butadiene rubber (SBR), acrylonitrile-butadiene rubber (NBR), butyl acrylate-butadiene, etc. Rubber, butyl acrylate rubber, butadiene-butyl acrylate rubber, 2-ethylhexyl acrylate-butyl acrylate rubber, 2-ethylhexyl methacrylate-butyl acrylate rubber, stearyl acrylate-butyl acrylate rubber, dimethylsiloxane-butyl acrylate rubber, silicone / Acrylic rubber such as butyl acrylate composite rubber, polyolefin rubber polymer such as ethylene-propylene rubber, ethylene-propylene-diene rubber, silicone rubber such as polydimethylsiloxane rubber Body, and these may be used alone or in combination of two or more.
[0011]
The rubbery polymer preferably has an average particle size of 0.05 to 1 μm, more preferably 0.07 to 0.4 μm. As the rubber-like polymer, those produced by the cohesive enlargement method using an acid group-containing latex can also be used.
[0012]
Examples of the glycidyl ester compound of α, β-unsaturated acid that is graft-polymerized to the rubbery polymer include glycidyl acrylate, glycidyl methacrylate, and glycidyl ethacrylate, and are used alone or in combination of two or more. be able to. Specific examples of preferable glycidyl ester compounds include glycidyl methacrylate.
[0013]
Examples of the vinyl cyanide compound used in the graft copolymer (A) and the vinyl copolymer (B) include acrylonitrile and methacrylonitrile, and examples of the aromatic vinyl compound include styrene, α-methylstyrene, Examples thereof include p-methylstyrene, p-isopropylstyrene, chlorostyrene, bromostyrene and the like. Examples of the alkyl (meth) acrylate compound include methyl (meth) acrylate, ethyl (meth) acrylate, and butyl (meth) acrylate. Furthermore, other copolymerizable vinyl compounds include acrylic acid, methacrylic acid, maleimide compounds such as N-phenylmaleimide, vinyl acetate, ethyl vinyl ether, etc., and these may be used alone or in combination of two or more. Can do.
[0014]
The graft copolymer (A) and the vinyl copolymer (B) are preferably obtained by emulsion polymerization, but may be produced by any polymerization method. For example, any bulk polymerization method, solution polymerization method, suspension polymerization method, emulsion-suspension polymerization method, emulsion-bulk polymerization method, etc. can be produced by any polymerization method as long as the composition can be controlled within the target range of the present invention. You may have done. For example, in the case of the graft copolymer (A), the monomer mixture may be polymerized with a radical initiator in an aqueous medium in the presence of a rubber-like polymer. At that time, the monomer mixture to be graft-polymerized may be used as a mixture, or may be divided and used as necessary. Furthermore, the method for adding the monomer mixture is not particularly limited, and may be charged all at once or sequentially.
[0015]
As the radical initiator, known initiators such as a thermal decomposition initiator such as potassium persulfate and a redox initiator such as Fe-reducing agent-organic peroxide can be used. In addition, a polymerization accelerator, a polymerization degree regulator, and an emulsifier can be appropriately selected and used. The polymerization temperature is preferably 30 to 90 ° C.
[0016]
The blend ratio of the graft copolymer (A) and the vinyl copolymer (B) in the resin composition constituting the lamp body of the present invention may be appropriately determined in order to obtain the desired physical properties. The graft copolymer (A) is 100 to 10 parts by weight, preferably 60 to 10 parts by weight, and the vinyl copolymer (B) is 0 to 90 parts by weight, preferably 40 to 90 parts by weight. It is also possible to polymerize the vinyl copolymer (B) in the same reactor after polymerizing the graft copolymer (A).
[0017]
The intrinsic viscosity of the resin composition (C) mainly composed of the graft copolymer (A) and the vinyl copolymer (B) is 0.25 to 1.5 (dl / g) in a methyl ethyl ketone soluble component. ) (N, N-dimethylformamide solution, 30 ° C.) is preferred.
[0018]
The method for obtaining the resin composition (C) from the latex of the graft copolymer (A) or the vinyl copolymer (B) may be a known method. For example, it can be obtained by coagulation with an inorganic salt such as calcium chloride, magnesium chloride or ammonium sulfate, or an acid such as hydrochloric acid, sulfuric acid, phosphoric acid or acetic acid. If necessary, when resin blending, a general method, for example, using a blender such as a Henschel mixer or a ribbon blender, the desired stabilizer, antioxidant, ultraviolet absorber, lubricant, pigment, inorganic filler, Glass fibers can also be used as necessary. In particular, phenolic, sulfur-based, phosphorus-based, hindered amine-based stabilizers used in styrene-based resins, antioxidants, benzophenone-based, benzotriazole-based UV absorbers, and organopolysiloxanes, ethylenebisstearic acid amides, fats Lubricants such as aliphatic hydrocarbons and esters of higher fatty acids and higher alcohols can be used as molding resins in order to achieve higher performance. These stabilizers and lubricants can be used alone or in admixture of two or more.
[0019]
In addition to the graft copolymer (A) and the vinyl copolymer (B), the resin composition (C) constituting the lamp body includes ordinary ABS resin, AS resin, polycarbonate resin, polyvinyl chloride. It can also be used by blending with resin, polyamide resin, PET resin, and PBT resin.
[0020]
In the present invention, the heated body is pressed against the lamp body molded from the rubber-reinforced styrene resin such as the resin composition (C) as described above and melted, and then the melted portion is pressure-bonded to the lamp lens. A vehicle lamp is manufactured by joining a body and a lamp lens. The temperature of the hot plate in the above case is preferably performed by heating to 250 to 500 ° C. Further, as the lamp lens joined to the lamp body, it is preferable to use a lens made of methyl methacrylate resin.
[0021]
【Example】
EXAMPLES Hereinafter, although an Example demonstrates this invention concretely, these Examples do not limit this invention at all. In the description of the examples, unless otherwise specified, “part” represents part by weight, and “%” represents weight%.
[0022]
(A) Production of graft copolymer (A) The following substances were charged into a reactor equipped with a stirrer, reflux condenser, nitrogen inlet, monomer inlet, and thermometer.
Pure water 250 parts Rubbery polymer Types and amounts listed in Table 1 Sodium formaldehyde sulfoxylate 0.3 parts Ferrous sulfate 0.0025 parts Ethylenediaminetetraacetic acid 0.01 parts Nitrogen stream while stirring the reactor The temperature was raised to 60 ° C. below. After reaching 60 ° C., the monomer mixture shown in Table 1 was continuously added dropwise over 5 hours. After completion of the addition, stirring was further continued at 60 ° C. for 1 hour to complete the polymerization.
[0023]
[Table 1]

[0024]
(B) Production of vinyl copolymer (B) The following substances were charged into a reactor equipped with a stirrer, reflux condenser, nitrogen inlet, monomer inlet, and thermometer.
Pure water 250 parts Sodium laurate 3 parts Sodium formaldehyde sulfoxylate 0.4 parts Ferrous sulfate 0.0025 parts Disodium ethylenediaminetetraacetic acid 0.01 parts While stirring the reactor, the temperature was raised to 60 ° C under a nitrogen stream I let you. After reaching 60 ° C., the monomer (I) shown in Table 2 was charged. After sufficiently emulsifying, the monomer (II) shown in Table 2 was continuously added dropwise over 6 hours. After the addition was completed, stirring was continued at 60 ° C. for 1 hour to complete the polymerization.
[0025]
[Table 2]

[0026]
(C) Manufacture of lamp body resin composition (C) for vehicle lamp and evaluation of stringiness properties Graft copolymer (A) and vinyl copolymer (B) produced in (a) and (b) above After mixing in the latex state at the ratio (solid content) shown in Table 3, adding an antioxidant to this mixed latex and coagulating with calcium chloride, heating, dehydrating, washing with water, drying, Phenolic antioxidants (AO-20: Asahi Denka Kogyo Co., Ltd., 0.3 parts), phosphorus stabilizers (PEP-24G: Asahi Denka Kogyo Co., Ltd., 0.3 parts), lubricant EBS ( Ethylene bis stearic acid amide 1.0 part) was blended as a common additive and an antistatic agent (sodium tetradecane sulfonate or sodium dodecyl benzene sulfonate) as shown in Table 3 to give a temperature of 250 ° C. In the extruder (Osaka Seiki Co., Ltd., 40 mm diameter single screw extruder) to obtain a pellet at. The obtained pellets were molded into ASTM No. 1 dumbbell and the lamp body product shown in FIG. 1 at a temperature of 250 ° C. using a 150 ton injection molding machine (manufactured by FANUC). The results are shown in Table 3.
[0027]
(D) Evaluation of yarn pullability using dumbbell test pieces ASTM No. 1 dumbbell obtained by injection molding was left in the environment of the following conditions (1) and (2) immediately after molding.
Condition (1): left in a temperature-controlled room at 23 ° C. and a relative humidity of 50% for 1 week.
Condition (2): Assuming low humidity in winter, left in a constant temperature room at 5 ° C. and 15% RH for 1 week.
Using this test piece, after pressing for 10 seconds at a pressure of 10 kgf / cm ² against an aluminum flat plate heated to 320 ° C., the dumbbell was pulled up at a speed of 500 mm / min. The length [cm] was measured.
[0028]
(E) Evaluation of stringiness using lamp body product The lamp body product shown in FIG. 1 obtained by injection molding was immediately left in the environment of the following conditions (1) and (2) immediately after molding.
Condition (1): left in a temperature-controlled room at 23 ° C. and a relative humidity of 50% for 1 week.
Condition (2): Assuming low humidity in winter, left in a constant temperature room at 5 ° C. and 15% RH for 1 week.
This product was pressed against an aluminum hot plate for 10 seconds at a fusion temperature of 320 ° C. and a pressure of 10 kgf / cm ² using a hot plate fusing machine, and then lifted at a speed of 50 mm / min on the fused surface. It was determined whether stringing occurred.
[0029]
[Table 3]

[0030]
As is apparent from the results in Table 3, even when conditioned under low humidity, according to the present invention, compared to the case of using a lamp body made of an ABS resin composition of a comparative example that has been conventionally used. The stringiness in the hot plate welding method is greatly improved.
[0031]
【The invention's effect】
According to the present invention, by using a rubber-reinforced styrene resin blended with an antistatic agent, compared to the case of using a general rubber-reinforced styrene resin conventionally used as a lamp body material, For example, in a low-humidity environment such as in winter, a heated plate is pressed against the lamp body to melt it, and then the melted part is crimped to the lamp lens to join the lamp body and lamp lens to produce a vehicle lamp. This can greatly improve the stringing of the resin constituting the lamp body, and is particularly useful in the manufacture of vehicle lamps such as headlamps, winkers, and stop lamps.
[Brief description of the drawings]
FIG. 1 shows a cross-sectional view of a lamp body product used for evaluation of stringiness.
[Explanation of symbols]
1: Lamp body, 2: Lamp, 3: Fusion surface, 4: Lamp lens

Claims (18)

A lamp for manufacturing a vehicular lamp by pressing and melting a heated hot plate against a lamp body made of rubber-reinforced styrene resin and then bonding the melted portion to the lamp lens to join the lamp body and the lamp lens. The body is selected from the group consisting of alkane sulfonates, alkylbenzene sulfonates, polyalkylene glycols, polyalkylene glycol copolymers, and polyether ester amides with respect to 100 parts by weight of the rubber-reinforced styrene resin. A lamp body for a vehicle lamp molded from a resin composition containing 0.1 to 5 parts by weight of at least one antistatic agent.   The lamp body for a vehicle lamp according to claim 1, wherein the antistatic agent is at least one selected from the group consisting of an alkane sulfonate and an alkylbenzene sulfonate. The rubber-reinforced styrene-based resin is a resin composition whose main component is 100 to 10 parts by weight in total of 100 to 10 parts by weight of the following graft copolymer (A) and 0 to 90 parts by weight of the following vinyl copolymer (B). (C) a vehicle lamp for lamp body according to claim 1 or 2.
(A) 80 to 5 parts by weight of a monomer mixture is graft-polymerized to 20 to 95 parts by weight of a rubber-like polymer, and the monomer mixture contains a vinyl cyanide compound, an aromatic vinyl compound, and an alkyl (meta ) 99.9-60% by weight of at least one vinyl compound selected from the group consisting of acrylate compounds, 0-30% by weight of other copolymerizable vinyl compounds, and glycidyl ester compounds of α, β-unsaturated acids A graft copolymer comprising 0.1 to 40% by weight.
(B) A vinyl copolymer obtained by reacting 10 to 40% by weight of a vinyl cyanide compound, 60 to 90% by weight of an aromatic vinyl compound, and 0 to 30% by weight of another copolymerizable vinyl compound. The monomer mixture of the graft copolymer (A) is a vinyl composed of 0 to 40% by weight of a vinyl cyanide compound, 60 to 90% by weight of an aromatic vinyl compound, and 0 to 30% by weight of an alkyl (meth) acrylate compound. system compound 99.9 to 60 wt%, and other copolymerizable vinyl compounds 0-30% by weight, and alpha, according to claim 3 comprising a glycidyl ester compound 0.1-40% by weight of β- unsaturated acids Lamp body for vehicle lighting. The lamp body for a vehicle lamp according to claim 3 or 4 , wherein the content of the glycidyl ester compound in the monomer mixture of the graft copolymer (A) is 5 to 20% by weight. The lamp body for a vehicle lamp according to any one of claims 3 to 5 , wherein the glycidyl ester compound is at least one selected from the group consisting of glycidyl acrylate, glycidyl methacrylate, and glycidyl ethacrylate. The lamp body for a vehicle lamp according to any one of claims 3 to 5 , wherein the glycidyl ester compound is glycidyl methacrylate. The lamp body for a vehicle lamp according to any one of claims 3 to 7 , wherein the rubbery polymer has an average particle diameter of 0.05 to 1 µm. The rubbery polymer is polybutadiene rubber, styrene-butadiene rubber, acrylonitrile-butadiene rubber, butyl acrylate-butadiene rubber, butyl acrylate rubber, butadiene-butyl acrylate rubber, 2-ethylhexyl acrylate-butyl acrylate rubber, 2-methacrylic acid 2- Selected from the group consisting of ethylhexyl-butyl acrylate rubber, stearyl acrylate-butyl acrylate rubber, dimethylsiloxane-butyl acrylate rubber, silicone / butyl acrylate composite rubber, ethylene-propylene rubber, ethylene-propylene-diene rubber, and polydimethylsiloxane The vehicle lamp body according to any one of claims 3 to 8 , which is at least one kind. The lamp body for a vehicle lamp according to any one of claims 3 to 9 , wherein the vinyl cyanide compound is at least one of acrylonitrile and methacrylonitrile. The aromatic vinyl compound is styrene, alpha-methyl styrene, p- methyl styrene, p- isopropyl styrene, chlorostyrene, and any of claims 3-10 is at least one selected from the group consisting of bromostyrene The lamp body for vehicle lamps described in 1. The vehicle lamp according to any one of claims 3 to 11 , wherein the alkyl (meth) acrylate compound is at least one selected from the group consisting of methyl (meth) acrylate, ethyl (meth) acrylate, and butyl (meth) acrylate. Lamp body. The vehicle according to any one of claims 3 to 11 , wherein the other copolymerizable vinyl compound is at least one selected from the group consisting of acrylic acid, methacrylic acid, N-phenylmaleimide, vinyl acetate, and ethyl vinyl ether. Lamp body for lamps. After melting by pressing a hot plate heated to the lamp body according to any one of claims 1 to 13 vehicles, characterized in that by crimping the melted portion to the lamp lens to bond the lamp body and the lamp lens Manufacturing method for lighting equipment. The method for manufacturing a vehicular lamp according to claim 14 , wherein the heating plate is heated to 250 to 500 ° C. The method for manufacturing a vehicular lamp according to claim 14 or 15 , wherein a lens made of methyl methacrylate resin is used as the lamp lens. Lamp was melted by pressing a heated thermal plate body, a vehicle lamp formed by joining the lamp body and the lamp lens to crimp the melted portion to the lamp lens according to any one of claims 1 to 13. 18. The vehicular lamp according to claim 17 , wherein a lens made of methyl methacrylate resin is used as the lamp lens.

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